Foul detector and indicator for bowling alleys



March 1947. v p, sm 2,47,o92

' FOUL DETECTOR AND INDICATOR FOR BOWLING ALLEYS Filed March 4, 1942 4 snets-shee March 11, 1947. p SMITH 2,417,092

FOUL DETECTOR AND INDICATOR FOR BowLING ALLE's Filed March 4, 1 942 4 Sheets-Sheet 2 P. M. SMITH F 'OUL DEECTOR- AND INDICATOROR BOWLNG ALLEYS 4 Sheets-Sheet 5 Filed March 4. 1942 P. M. SMITH 2,4l7,092 FOUL DETECTOR A ND' INDICATOR FOR BOWLING ALLEYS March ll, 1947.

4 Sheets-Shet 4 Filed llafen 4. 1942 Jzyenvr 'Jm/mm ju. &nm

' Patented Mar. u, 1947 FOUL DETECTOR AND INDICATOR FOB BOWLING ALLEYS Putnam M. Smith, Redwood Fil. Mimi., uignor of one-halt to A. Lelie Jane., Jr., Bedwood Falis, Minn.

Application March 4, 1942, Serial No. 433.287

8 Claim.

My present invention relates to systems and apparatus for automatically detecting and indicating fouls made in the game of bowling and provides, among other things, very material improvements over the previous apparatus oi this character and including the apparatus and system disclosed and broadly claimed in my previously filed co-pending application S. N. 421.435.

In the United States most league and tournament bowling is either Sponsored or sanctioned by th American Bowling Congress (otherwise known as "A, B. 0.") and is, therefore, conducted strictly` in accordance with the rules laid down by the said American Bowling Congress, whose rules deflnitely denne numerous acts which when committed by bowlers, constitute iouls. In all American Bowling Congress sanctioned bowling alleys the !oui line marker is distinctly provided at the j-unction of the alley and the approach or run-way thereto, and in "A, B. C." sanctioned league bowling prior hereto, foul judges have been employed for detecting and calling fouls. as they are committed, so that the players would be duly penalized. Usual'y.. however, there is 'only one foul judge for a plurality of parallel alleys in use at the same time, so that the responsibility of the !oui judge is very great and the likelihood oi his making an error, particularly by way of an oversight oi' a, toul committed by a bowler on one alley when two or more bowlers on diflerent alleys ioul at the same time, is ever present. Hence, there has been a great demand, extending over a, period of years, for an automatic mechanism for detecting and indicating those fouls deflned by the American Bowling Congress. `In response to this long recognized demand much research has been conducted and numerous i'oul detecting devices have been developed (some to the point of extensive commercialization). The fact remains, however, that all previous attempts to, solve this problem have been objected to as being incapable of detecting ali or the kinds oi' iouls laid down by the American Bowling Congress and also as being incapable oi' dependably distinguishing between a bowled ball and part oi a bowler's body. In this connection it may be said that the' 2 the American Bowling Congress and, therefore, could not -be approved by the American Bowling Congressfor use by teams or leagues sanctioned or sponsored thereby. The apparatus of the present invention entirely overcomes the above objections and has demonstarted its capability o! dependably detecting and a detector zone and the time interval required for a bowler's foot or other part ot his body to pass through or into and out ot such detector zone. With such prior art systems exceptionally slow balls would often result in erroneous foul signals and actual fouls of exceptionaly short duration 421.435, while undoubtedly constituting a very greatimprovement over all of the prior art devices of this character, particularly with respect to its ability to reliably distinguish between a bowled ball and a bowler's foot slid over the foul line and its ability to detect certain types of fouls with absolute dependability,` was incapable oi detecting several other kinda o! iouls deflned by would often go undetected. As an important feature of the present invention. however, I have solved this problem of distinguishing between bowled balls and !ouis without regard to the element of time, so that a bowling ball can actually 'stop any place on the tou line or bowling alley i without causing the apparatus to call or signa aiou and when a !oui is .actually committed the apparatus will respond theretc and call the foul regardless oi' how short the time consumed in committins the ioul.

Generally stated, any portion of a bowler's body that is projected over .the foul line and on to the surface oi' the bowling alley. while the bowler is engaged in the act oi bowling a ball that is subsequently discharged on to the alley, or, as a result of the act'- of discharging a bowling ball on to the alley. constitutes a foui, whereas, the projecting over the !oui line and on to the alley of any part of a bowler's body prior to an act actually resulting -in the discharge of a bowled ball on to the alley does not constitute a ioul. With this general rule in mind, attention is direci-.ed to the fact that bowlers often project their feet or other portions of their bodies over the iou line on to the alley.` while waiting for the pin setters, or otherwise, prior to engaging in the act which actually results in the discha'ging of a bowled ball and that. while these pre-play encroachments on the !oui line do not constitute iouls, prior art detecting and indicating systems have had the annoying and obiectionable characteristic of indicating fouls each time such preplay encroachments on the foul line occurred.

Another important object and advantage of my present invention is, thereiore. the provision of an automatic toul indicating system that will call fouls according to the established rules of the game, even to the extent of distinguishing between an actual roul and the same encroachment on the foul line committed prior to the act resulting in the discharge of a bowled ball.

The above and numerous other important objects and advantages of the present invention will be made apparent from the fonowing specification andclaims, together with the appended drawings.

In the accompanying drawings like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a plan view with some parts broken away oi' a conventional bowling alley equipped with the ioul detecting and indicating system of the present invention;

Fig. 2 is a fragmentary perspective view showing the front end portion and runway leading to the bowling alley of Fig. 1;

Fig. 3 is a diagrammatic view illustrating a preferred electrical book-up and the various component parts making up the pr'eferred embodiment of the invention herein illustrated;

` Fig. 4 is a somewhat enlarged fragmentary sectional view taken on the line 4--4 of Fig. 1;

Figs. 5, 6, 7, 8 and 9 are fragmentary perspective views on reduced Scales showing several different kinds of fouls which will be detected by the present system; and

Fig. 10 is a diagrammatic view illustrating the i electrical hook-up of a modified form of the invention embodying, in addition to all that is shown in Fig. 3, a further important feature. In this last view only those elements of Fig. 3 necessary to an explanation of the additional feature have been illustrated and all other parts and wires common to Fig. 3 have been broken away.

With reference particularly to Figs. 1, 2, and 4 to 9 inclusive, a conventional bowling'alley is indicated .by ill, the approach or runway to the alley by fli, and the foul line marker between the runway or approach M and the alley Hi is indicated by !2. In several of these'same figures a wall adjacent one side of the alley se and runway i! is indicated by !3 and the gutters at opposite sides of the alley i@ are indicated by lt. A vertical foul line marker (12' on the wall !3 is shown in Figs. 2, 5, 6 and 9 and in Fig. 1 the customary bowling pins are indicated at &5.

The foul signal apparatus proper of the present invention, like that of the invention of my prior application, above identified, includes both visual and audible signalling devices contained within a common signal housing or casing !6 that is preferably situated near the rear of the alley and suitably Suspended above the same. The visual signal device is shown as being in the nature of an incandescent lamp and the audible signalling device illustrated is shown as being in the nature of a bell !8 of the conventional electromagn'etic type.

In the preferred embodiment of the invention, herein illustrated, a plurality of detectors Pl, PZ, P3, Pd, P and PE are employed, these preferably and as illustrated being in the nature of photoelectric cells. The photo-electric foul detecting devices Pi to P5 inclusive are located within a common casing !9 positioned at one side of the alley and having a plurality or light admltting apertures, one located in front of each oi' the photo-electric cells PI to PS inclusive. The photo-electric foul detecting device PS is enclosed in a separate' casing 20 located on the wall I: several feet above the plane of the alley and inwardly of the wall fou line marker strip I2' and which, casing, may be assumed to have a downwardly opening light receiving aperture, not shown.

The photo-electric cell detector PI is normally activated by a single leg light wave beam z. The photo-electric cell. detector P2 is normally activated by a si-ngle leg light wave beam 22. The photo-electric cell detector P3` is normally activated by a multiple leg zigzag light wave beam 23. The photo-electric cell detector PI is normally activatedby a single leg light wave beam 24. The'photo-electric cell detector P5 is normally activated by a light wave beam 25, and the photo-electric cell detector Ps is normally activated by a multiple leg zigzag light wave beam 26.

The light wave beams z to 25 inclusive are emitted from the common light projector casing 21' through light emitting apertures 2I' to 25' inclusive respectively, back of each of which, light emitting apertures, is a suitable incandescent lamp L and a refiector R..

The light wave beam 26 originates in one end portion of the housing IS and is emitted from said housing through a light emitting aperture 25'. The zigzag or multiple leg light wave beam 23 is reflected several times across the alley o by reectors 28 located on the sides of the casings !9 and 21. The multiple leg wall beam 26 is refiected back and forth several times between the plane of its light source L and the plane of the detector PB by a series of reflectors 29 and 30, the iormer being mounted on the wall na and the latter being mounted on the top of casing 99. The light beams Zi to 25 inclusive are all directed parallel to the surface of the alley lil and far below the plane of the maximum diameter of a ball B positioned on the alley. The light beam 22, however, is, while also directed parallel to the surface of the alley, located directly over the beam 2! and much closer to the plane of the maximum diameter of the ball B. The wall beam 26 is dlrected in closely spaced parallel relation to the wall !3. Obviously each of the beams ti, 22, ?2 3 and 25 and each leg of zigzag beam 23 constitutes a narrow detector zone through which a ball B rolled over the foul line and down the alley will pass.

The entire apparatus hereof is powered from a conventional alternating current power and light line consisting of leads 30 and 3! which, for the purpose of this case, may be assumed to carry volts. The power line leads 30 and 3! enter a combined switch and fuse box 32 and are connected, the former to a fuse F and the latter to a master control switch S.

Further apparatus diagrammaticaly indicated in Fig. 3 includes thermo-electronlc vacuum tubes VI 'to Vw inclusive, transformers of the stepdown variety T'i, Ta, Te, Tlo and TIB, and electro-magnetic relays Ri to R!) inclusive. The vacuum tubes VI to Vw each include an electrically heated ament 33. Tubes V8 and Vlo are of the fast heating variety, wherein the filaments serve as the electron-emitting cathodes, and the tubes VI to V'I inclusive and V!) are of the slower heating variety embodying separate electronemitting cathodes 34. vacuum tubes Vs and vo are of the type 80 rectifler series and each have two plates or anodes 33 which, tor the present purpose, are connected together tor hall wave rectiil cation. The other vacuum tubes are all of the multiple grid type and of these tubes Vl and VO each have their two grids and plate connected together to serve as a common anode 33, whereas tubes VI to vs inclusive each have'only one grid connected to the plate thereof to serve as common anode 36. The other grids of the tubes VI to VB inclusive are reserved for the use as control. grids and are indicated by 31, i,

The relays RI to RS inclusive each include an electro-magnetic coil 33 and switches under control thereot and which, switches, will immediately be described. The switch of relay RI comprises contacts 33 and 40. The switch of relay R2 comprises contacts 4| and 42. The switch of relay R3 comprises contacts 43 and 44. The switch of relay R4 comprises contacts 45 and 48. The

switch of relay RI comprises contacts 41 and 48.`

The switch of relay RG comprises contacts 49 and 33. The relay Rfl includes two switches one comprising contacts il and 52, and the other comprising'contacts 53, 54 and 55. The switch of relay Ra comprises contacts 56 and 51. The relay RS includes two switches, one oi which comprises contacts 53 and 59, and another of which comprises contacts 30, 6! and 62.

The primary windings of transformers T'I, T9 and Tlfl and the primary oi a transformer T are connected in parallel across the power line leads 30 and 3| through the medium of leads 30' and 3I' which latter leads form extensions of the power line leads 30 and 3| respectively. Hence,

these transformers T, TIO, T'I and Ts will always be energized when the master control switch S is e vo, a lead' sl. the cell PI, a load resistor 92 closed. The primary winding of transformer Ts is connected across the leads and 3| in a normally open circuit comprising leads 65 and 56, contacts il and 52 of relay R'l, and a lead 51.

The foul signal lamp il is connected across the leads 30' and 3|' in a normally open circuit comprising a lead 63, a lead 69, part o! lead 66. contacts sl and 52 of relay R'I, and lead 61. The signal bell s is permanently connected across the secondary ot the bell transformer Tls and the primary winding of said transformer Tls is connected across the signal lamp leads 38 and 69, so as to be in parallel with the signal lamp, by a normally closed shunt circuit comprising leads 13 and ll, the latter of which, leads, has interposed therein the normally closed contacts 53 and 51 of relay RI.

For the purpose of indicating to the players, and also preferably to the pin setter. the condition of the signal detecting apparatus, I preferably provide a tell-tale lamp 12 that is adapted to be energized by closing of any one oi! the following described parallel circuits. to wit, (a) part of the lead 63, the lead 10, a lead 13, said tell-tale lamp 12, a lead 14. contacts 30 and Bl of relay RO. a lead 'II and part of lead 61; (b) a circuit parallel to the one just described and comprising leads 63, 10, 13, 14, 18, contacts 48 and 45 of relay R4. a lead 'I'I and leads 13 and 61; and (c) a normally open circuit just as described in connection 6 ments of the said several lamps L are connected in parallel.

The fllaments 33 of vacuum tubes VI to Vi'inclusive are operated directly rrom the power line extension leads 30' and 3l' in a common series circuit comprising leads 30, 3l. a voltage dropping resistor 32 and a lead 33. The fllament 33 o! vacuum tube Vl is operated from the secondary of transformer TT, through a normally closed circuit comprising a lead 34. contacts 33 and 34 of relay RJ, and a lead 35. The filament 33 of vacuum tube vs is energized from the secondary of transformer TI through a permanently closed circuit comprising leads 33 and 31.' The fllament and a lead 93 returning to the A. C.'line through lead 3l'. The circuit or cell P2 comprises lead 90, rectifler tube vo, lead si, a short lead 84, a load resistor 92, a lead 95 and *lead 93. The input or positive sides of the circuits of photo cell detectors P3, P4 and P! are all commoned with the input or positive sides of cells PI and P2 by a common lead 93. The output side of each of the cells P3, P4 and PS is connected through its own load resistors 32 and the common lead. that connects to the power line extension respectively, but current flowing in the circuit of any one oi' the photo cells Pi to PG inclusive will be greatly reduced upon interruption of its respective cooperating light beam. the light beam to any one of the photo cells is interrupted, the resultant variation in current flow in the circuit of that cell will produce avariation in the voltage drop across the load resistor 92 of that circuit.

For the purpose oi' transmitting the voltage variation occurring across the load resistors 32 to the control grids 3'I of its cooperating vacuum tube VI, V2, VI, V4. VE or VS, suitable coupling condensers 39 are provided.

The cathodes 34 of the vacuumtubes VI to- Vs inclusive are all connected to the power line extension leads 3l' through leads already described.

The discharge circuit of vacuum tube VI comprises, in addition to leads so and vacuum tube Vlli, a lead oo, the solenoid coil 38 of relay RI, a lead o, the plate 33 and cathode 34 of vacuum tube VI. and lead 93 which runs to leads 3l'. The discharge circuit of vacuum tube vz comprises. in addition to leads and vacuum tube vo, part of lead 100. a lead IM. the coil 38 of relay R2, a lead !03, plate 38 and cathode 34 of tube V2, and leads previously described and runl ning to lead 3I'. The plate circuit of vacuum tube V3 comprises. in addition to lead 33 and T'ence, when 4 &417.098

- .7 4 rectiiler tube VIII, part of lead !88. a lead !88,

the coil 38 of relay R3, a lead !88, the plate 38 and cathode 34 of vacuum tube V3, and leads previously described and 'running to power line extension lead 3!'. The discharge circuit of the vacuum tube VI also includes the rectifler tube V!!! and further comprises part of lead !88, part of lead !84, a lead !88, coil 38 oi relay RA, a lead !01, the plate and cathode of tube Vi and leads previously described running to leads 3!'. The discharge circuit ofvacuum tube V8 also includes the rectifier tube V!8 and further comprises parts of leads !08, !88,188 and a lead !88, the coil 38 oi' relay RS, a lead !88, the plate and cathode of tube Vs and leads returning to lead 3!'. The discharge circuit of vacuum tube V8 also includes the rectifier tube VIO and further comprises part of lead !88, part ot lead !82, a lead !!8, the coil 38 of relay RG, a lead the plate and cathode of vacuum tube VS and leads prevlously described and which run to power line lead 3l'.

With the arrangement above described, the control grlds 31 will be swung in a positive direction bycurrent flowing in the circuits of photocell detectors P! to PE inclusive, respectively so long as said cells are activated by their respective cooperating lig ht beams 2! to 28 inclusive, and of course when the control grids 31 of said tubes V! to VB inclusive are swung in a, positive direction, maximum current will flow in the plate circuits of said tubes and will operatively energize the coils 38 of relays RI to RS inclusive. However, when the light beams to any one of the photo-cell detectors P! to P8 inclusive is interrupted, current flow in the circuit of that photo-celi detector will drop materially, which will result in the grid 3'! of the coupled tube Vi, VZ, V3, Vt, V or Vt being swung negative. When the grid 3? of any one of the tubes V! to VE, inclusive, is thus swung negative, the current flow in -the plate circuit of that tube will be greatly reduced, with the result that the movable switch contact or contacts of the relay RI, RZ, R3, R t, RE or Rt whose coil is connected in that plate circuit will be dropped to its lower position.

Coil 38 of relay R'! is adapted to be energized by current supplied from rectifler tube Vl upon completion of any one of four circuits each of which includes the contacts 58 and 58 of relay RE and which four circuits are as foliows, to wit, (1) the first of these circuits comprise :lead 98,

anode and cathode of V'l, a lead 2, the coil` 38 of relay R'I, a lead 3, part of lead 84, a lead Ut, contacts 38 and 88 of relay Ri, a lead 5, contacts 59 and 58 of relay Rt, lead 15, and part of lead 81; (2) the second of the circuits for the coil 33 of relay Rri is common to the circuit described under (1) above down to the coil 38 of relay R'! and further comprises lead !!3, part of lead 84, a short lead !!8, contacts 4! and 42 of relay R2,`a lead ill, part of lead 5, contacts 59 and 58 of relay R8, lead 15, and part of lead 61; (3) the third of the circuits for the coil 38 of relay R'! is also common to the circuit described under (1) above down to the coil 38 of relay R'! and further comprises the lead !53, part of lead 841, part of lead llt, a lead 8, contacts 83 and M of relay R3, a lead 9, part of lead 5, contacts 59 and 58 of relay RS, lead 15 and part of lead 61; (4) the fourth of the said circuits for the coil 38 of relay R' is also common to the circuit described under (1) above down to prises lead !!3. part oi lead 88. part of lead IN, a lead !28, contacts 48 and of relay RB, a lead !2!, part oi lead !!8, contacts 59 and 88 or relay R8, lead 18, and part-of lead 61 extending to lead 3!'.

The coil 38 of relay R8 is adapted to be supplied with rectifled current !rom vacuum tube VS through any one of three paraliel circuits which are as toilows, to wit, (1) lead 88, plate and cathode elements of V8, a lead !22, the coil 38 of relay R8, a lead !23, part of lead 88, lead '16, contacts 48 and 48 of relay RA, lead part of lead 15, and part of lead 81 extending to lead 3!'; (2) the second of the said circuits for the coil 38 of relay R8 is common to the circuit described under (1) above down to the coil 38 of relay RS and further comprises the lead !23, part of dead 88. part or lead 18, contacts 48 and 41 of relay Ri, a lead !24, part o! lead Il, part o! lead 15, and part ot lead 61 running to lead 3!'; (3) the third of the said circuits for the coil 38 of relay RS is also common to the circuit described under 1) above down to the coil 38 of relay R8 and further comprises lead !23, part of lead 88, part of lead 14, contacts 6! and 88 of relay RS, lead 15, and part of lead 61 running to lead 3!'. As will hereinater be apparent, the contacts of relays RA and RS are only momentarily closed and serve merely to initiate closing of a circuit through the coil 38 of relay RS which results in closing of contacts 5! and 60 of relay RS which thereafter serves to hold or maintain a circuit through the coil 38 of relay Ra independently of either of the switches of relays RA or R5-.

The coil 88 of relay R8 is adapted to be energized by rectied direct current supplied from rectifier tube VB and is, therefore, serially connected in the discharge circuit of tube V& which comprises lead 88, plate 35 and element 33 of tube VB, a lead !25, the coil 38 of relay Ra, a lead !28 and part of lead 67 extending to power line lead 3i'.

operation, Figs. 1 to 9 inclusive To render the system operative, it is merely necessary to manually close the switch S which will remain closed during the entire period that the equipped alley is in use. Responsive to closing of the switch S the following things occur, to wit, (a) the circuits of the heaters or filaments of the vacuum tubes V! to Vl inclusive and V@ and !8 are immediately energizedso that said tubes will become operative as soon as they have heated up, while leaving vacuum tube V@ in an inoperative condition with its filament in a, de-energized condition; (b) the light beam projector lamps L will all be rendered operative and will complete the light wave beams 2! to 28 inclusive, thereby activating the photo-electric cell detectors P! to Ps inclusive; (c) the activation of the cells P! to P6 inclusive will result in current flow through the circuits of said cells which, in turn, results in a Swinging of the grids 3'! of the tubes VE to VB, inclusive, in a positive direction; (d) 'With the control grids 31 of tubes V! to VB inclusive thus swung in a positive direction, maximum current will flow in the discharge circuit of said tubes V! to VG inclusive, thereby energizng the coils 38 of relays R! to RG inclusive and causing the movable switch contacts of relay R! to RS inclusive to be moved to their upper positions shown in Fig. 3. When the above functions are?, completed, all oi' the switches will be in the post-" &417.099

tions shown in m. 3 in which condition o! the apparat'us the i'oul signals l1 and II and the teu-tele' lamp 12 are inoperative, as is also vacuum tube VO. The apparatus will now remain in the condition shown in mg. 8 until one or more of the light beams :I to !4 inclusive is interrupted.

Now ii we assume that a ball is bowied and that this bowied ball is rolled over the foul line z, it will be seen that the ball will successively pass through the beams 22, 2l. 23, !4 and 25 in the order just named. Oi' course, the ball thus rolled will pass out of all oi the detector zone-creating beams 2I, 22 and !I before entering and interrupting either o! the beams 24 or 25. Now this successive interruption oi' the light beams 2l to 25 inclusive results in the following i'unctions, to wit. (a) the momentary de-activation of cells PI, PI, Pa, PA and P! in the order just named: (b) the successivo momentary swinging of the control grids 34 to vacuum tubes VI. Vi, Vi, V4 and VS in a. negative direction in the order just named; (e) the consequent falling oi! ot the flow ot current in the discharge circuits oi' vacuum tubes VZ, Vi. Vs, vs and Vi in the order just named; (d) the momentary de-energization of the coils 38 of relays R2, Rl. R3, R4 and RI; and (e)' the momentary closing of contacts 39 and 40 of relay Ri, contacts 4l and 42 oi' relay RI, contacts 43 and 44 ot relay RG, contacts 45 and 48 oi' rel'ay R4, and contacts 41 and 48 oi'relay Ri. since the normally open contacts of relays Ri to R3,'inclusive, are all interposed in circuits that include the coils 38 of relay R1 and the now open contacts 50 and 59 ot relay RS, it will be apparent that there will be no function resulting from the above described momentary closing oi' the said norlay Ra and which comprises lead 90, vacuum tube VS, lead !22. lead !23, part of lead 84. lead 18, contacts 48 and 45 oi relay R4, lead 11, part of lead 15. and part of lead 61; (b) as a result oi the said momentary closing of the circuit through coil 38 of relay RS, contacts &I and 60 oi relay R! will be closed to provide a holding circuit for the coil 38 of relay Re comprising lead !0, vacuun tube vs, lead !22. lead m. part oi' lead 80, part of lead 14, contacts CI and sa oi' relay RS, lead and part oi' lead 61; (c) the opening of contacts Bl and 62 of relay RS and consequent de-energizatlon of the circuit for the fllament 33 oi' vacuto their normal lower positions. Oi course, the

v cooling time required !or the tube VO to effectively de-energize the coil RS responsive to opening oi' its fllament circuit will depend upon the type oi' tube used but prei'erably a tube will be selected that will give an Operating interval of from six to twelve seconds ior the relay coil oi RS. The tell-tale lamp 12 will remain operative during this six to twelve second intervai, only, during which time it wl ll indicate that a ball has been bowied and that the system is in condition to call a foul responsive to any encroachment upon the foul line during the period it is illuminated. Hence, it the bowler should drop any article on to the alley while discharging the ball the tell-tale lamp will warn him against attempting to pick it up during the period said tell-tale lamp is operating.

since the contacts 58 and 59 of relay RO are interposed 'in a plurality of circuits each of which includes the coil 88 of relay R'I and the pair oi' contacts ot a diii'erent relay Ri. RI, na or RS. there will be no function resulting from the closing .oi contacts 58 and 59 at this time. due to the now open condition of the contacts oi' all ol' said relays Ri, R2, RS and RS. This momentary closing oi' contacts 41 and 48 of relay RI! will tend to prcduce exactly the same functions as are above described in connection with the momentary closing o! contacts 45 and 48 of relay R4. but when the contacts 41 and 48 or rela RS are momentarily closed subsequent to establishing of the holding circuit through relay- RS, as above described, the said closing, thereof will only tend to 4 accomplish what has already been accomplished um tube vs which circuit comprises lead u, part i of lead 14, contacts il and 62 ot relay R9, and a lead 89; and (d) the completion of the circuits for the tell-tale lamp 12 as a further direct result of closing of contacts OI and of relay R! and which comprises lead GB, lead 13, lead 14, contacts si and, lead 15, and lead 81; and (e) the closing of contacts 53 and 59 of relay RS.

In view of the holding circuit for coil 38 oi relay RS esta-blished through contacts BI and 80 oi' relay R9 and the breaking of the fllament .circuit of tube vs by opening oi' contacts!! and !I oi' relay RS, the movable contacts 58 and Bl oi' relay RS will remain in their upper positions independently oi' the contacts oi relays' R4 and R5 but only for the relatively brief period. that is required iorthe tubes VS to cool to the point where the coil 38 of relay Re becomes de-energized, at which time the contacts ti and u oi' relay RO will return by the' closing of the contacts of relay R4. However, .if the ball should have been loited over and missed the beam 24, the interception oi' beam 25 by the ball B would have resulted in momentarily closing oi contacts 41 and 48 of relay RS while coil 38 of relay RS was de-energized, and the result of such closing would have been just as described in connection with the closing oi' the contacts of relay R4 in the i'oregoing description of the operation.

Il' no foul is committed during the six to twelve second period that the coil 38 of relay ne is energized, the system will automatically resume its normal condition shown in Fig. 3 at the termination of this period. However, it a foul be committed during the period that the coil of relay Re is energized, the foul signals I 1 and s will, as will hereinaiter be made apparent. be instantly set in operation;

Now let us assume that the bowler is in the act of committing what is commonly known as a toe foul (shown in Fig. 5) during the six to twelve second interval that the coil 38 of relay RS is energized. This so-called toe foul, as exemplifed in Fig. 5, consists in sliding the toe or forefoot over the `roul line i! and will usually result in interrupting only the beam !i to photocell PI. 01 course, when the beam 2| is interruptd,. the photo-cell detector PI will be momentarily de-activated with the result that the current flowing in the discharge circuit of V'I through coil 38 oi relay RI will momentarily drop and cause a momentary closing of contacts 39 and 40 oi' relay RI. Now this closing or recurrent closing of contacts 39 and 41!` of relay RI, during the interval that the coil 38 of relay RS is energized and the movable switch contacts 58 and BI are in their upper positions. will result in the following functions. to wit, (a) the initiating of a circuit through the coil 38 of relay R1 comprising lead 90, vacuum tube V 1. lead z. lead s,

&417.009

part oi' lead 84, lead II4, contacts u and 4I of relay RI, lead s, now closed contacts u and 58 oi' relay RO, lead 13 and part oi lead 01; (b) the establishment of a holding circuit !or coil 38 oi relay R'l comprising lead 90, vacuum tube V'I, lead l l2', lead 3, part oi' lead 44, contacts 54 and 53 o! relay RJ and lead 81: (c) the establishing ot a circuit through the coil 38 oi relay RB comprising lead 40, rectitier tube VO. lead !25, lead !28 and part o! lead 41 extending to lead a', this circuit being completely de-energized initially due to thecold inoperative condition of tube VB', (d) the completion o! the primary circuit of transiormer 're comprising lead 65. lead 86, contacts 52 and !I of relay RJ and lead 61: (e) the nitiating oi operation oi !oui signal I'I by completing the circuit therethrough comprising lead 60, lead 89, part of lead 44. contacts !2 and !i of relay Ri and lead I'l; (I) the establishing of the primary circuit of transformer 'ra i'or signal l8 and which comprises part of lead 88. lead contacts 51 and Bli o! relay RO, part of lead 69, part of lead 63. contacts 52 and SI o! relay R'I and lead 61: and (g) the opening of the filament circuit of tube V'l by opening of contacts 54 andi of relay RJ.

The i'oul lndicating signals !1 and i! will now be rendered simultaneously operative immediately upon energization of the coil 34 o! relay RT. but the audible slgnal s will be automatically turned ofl after a very brief period of operation (prei'erably three to five seconds) by 'virtue of heating of rectlfler tube VB and conse-' quent energization of coil 38 of relay RO and resultant opening of contacts BG and 51 of relay Ra. The operation of the' visible signal IT will he automatically termlnated at the termination of a somewhat longer period (preferably six to twelve seconds) by virtue of de-energization of the fllament circuit of tube VT resulting from opening of contacts 54 and of relay Ri and the cooling of said tube V'I.

From thevabove it will be seen that the length of the Operating period of the audible !oui signal !8 is determined by the time required for tube V8 to heat un to an operative condition and that the length of the Operating period of visible signai l'l is determined by the time required !or tube V'l to cool. These times may, of course, be varled by choice of tubes. The time oi termination ot the Operating period of the tell-tale lamp 12, on the other hand, is determined by the time required to cool vacuum tube VO. Obviously as soon as the tubes vl and vs have cooled to the point where coils 38 of relays RJ and RQ become de-energized, the entire apparatus will resume the normal condition shown in Fig. 3 and tube V? will immediately be re-heated preparatory to ioul detection.

One of the very important objects of the present invention, and one which was not s'neciflcally pointed out heretoi'ore, is the detection and indication oi' the so-called heel and toe type of foul, illustrat'ed in Flg. 6, wherein it will be noted that the bowler's heel is restin on the approach to the alley with his forefoot p 'o ecti g over the foul line i2 at a forward inclination out of the path of light beam 2! but in a position to intercept light beam 22. Of course, the interruption of light beam 22 and the consequent tie-activation oi photo-cell detector P2 will result in de-energization of coil 38 of relay R2 and the closing of contacts 4i and 42 of relay R2. This closing of contacts 4! and the coil l! of relay R'I eomprising lead !0, vacuum tube V'I, lead II2, lead I II, part of lead 84, lead m, contacts 4I and 42 of relay R2, lead ll'l. lead s, now closed contacts I! and 58 oi' relay RS, lead "II, and lead '41 to lead ti'. After this initial energization of coil. ot relay R'I, the movable contacts 54 and !I of relay R'l will be moved to their upper positions and the system will function exactly the same as it did responsive to initial energization of the coil 38 ai' relay 13.1 by the closing of contacts of relay If any leg oi the zigzag light. beam 2: be broken or remains broken, during the time that the coil 38 of relay R! has been energized as a result of a bowled ball having previously intersected either o! the beams 24 or 24, the resultant momentarlly de-energization of coil 38 o! relay Ra and closing o! contacts 43 and 40 of relay RS will initiate energization of the coil 88 oi' relay R'l by closing of the circuit comprising lead 90. vacuum tube V'I, lead Il2, lead 3, part of lead 84, part of lead ll4, lead s, contacts 43 and 44 oi' relay R3, lead ll-l, part of lead III, now closed contacts !a and BI ot relay Ra, lead ?5, and part of lead 01. This energization of coil 38 of relay R'I 'will result in moving of the contacts 5! and 54 of relay R'l to their upper positions and from this point on the system will function just as described in connection with the initial energization oi' coil 38 o! relay R'l by I closing of the contacts of either otrelays RI or R2. Two types oi' ouls which may not interrupt either of the light beams 2| or 22 but which inevitably interrupt one or more of the legs of the zigzag light beam 23 are shown in Figs. 7 and 8. In connection with Fig. 'I it may be assumed that the bowler has stepped over both of the beams 2l and 22 without interru'p'ting the same and placed his foot on the alley in a position to intercept one or more of the legs ot zigzag beam 23. In Fig. 8 it is assumed that' the bowler stumbled in the course of discharging the bowled ball and landed with his hands on the alley in a position to interrupt one or more legs of the zig zag beam 23 and without having interrupted either of the beams 2l or 22. O! course, in connection with either Figs. 7 or 8, it may be assumed that the bowler has successively interrupted the beams 2i, 22 and 23, but from what has been previously said, it should b] clear that the end point result would be identic .Another type of !oui which is quite commonly made on alleys bordering a wall or a convenient pillar is' the so-called wall foul exemplifled in and part of lead 81 to lead a'.

Fig. 9, wherein it is'assumed that the bowler has placed his hand on the wall inwardly of the foul line markers |2 and l2' to prevent fall ing on the alley. When the bowler commits this act, his hand or arm will intercept one or more legs of the beams 26 which will result in deaotivation of the photo-cell detector PB and consequent deenergization of the coil 38 of relay RG. This de-energization of coil 38 of relay RG results in closing of contacts 49 and 50 of relay RG and the Initial energization of coil 38 of relay Ri by completion of the circuit comprising lead 90, vacuum tube V'I, lead II2, lead II3, part oi' lead 84, part of lead ll4, lead !20, contacts 49 and 50 of relay RG, lead IZI, part of lead HE, contacts 59 and '58 oi' relay RS, lead 15, As a result of this initial energization of coi 38 of relay Rl,

42 of relay R2 closes an initiating cirult through contacts 54 and il of relay RJ are moved to From the ioregoing 'it should be obvious that.

the interruption oi any one or plurality of light heams z, 22, 23 or 20 prior to interruption oi' one or both ot the light beams 24 or !I cannot possibly result in a signal ot any kind, since the coii :I oi relay RI wil be in a de-energized condition with the-movable contacts II and II thereot in their lower normal positions wherein,

among other things. the clrcuits through coil 30 of relay R'I is opened by virtue of the open condition of contacts I! and II oi relay Ri.

While it has been assumed in the ioregoing description oi' the operation that a bowled ball would roll through all oi the beams !I to !I inclusive. attention is directed to the fact that many bowlers bowl what is known as a lofted ball which lands on the alley at some distance from the ioul line I2, and it is !or this reason that I space the light beam 24 at some distance (approximately !our feet) from the foul line I 2 where it wiu be intercepted by most bowled balls but where it is not so tar spaced from the foul line as to produce a serious time lag between the discharge of even a slow ball from the' bowler's hand and the intersectionoi the light beam 24. In fact, exhaustive experiment has conclusively proven that the time interval consumed for the ball to pass from a bowler's hand to the light beam 24 is so very short as to make the commission and completion of a ioul in that period a virtual impossibility.

The purpose of the detector zone-iorming light beam 25, which is spaced considerably further from the foul line |2 than is the beam 24, ls to catch a fast and high lotted-ball which might possibly have passed above the light beam 24. Although the spacing of the beam !I from the foul line I! may be considerably greater than the spacing of beam 24 ot the toul line !2, the time interval consumed for an exceedingly fast ball to pass the bowler's hands to the beam 25 will usually be lessthan the time required for a slower bowled ball to pass from the bowler's hand to the l ght beam u.

With respect to Fig. 3. all ot the elements therein lying to the left oi' the signals l'l, ll and 12, constitute toul detecting signal control apparatus and, in a sense, this detectlng and signal control apparatus is a double or duplex system involving cooperating primary and secondary control apparatus. In this connection it may be said that the primary control apparatus for' the si nal ll, comprises photo-cell detectors Pl and Ps and their respective cooperating light wave projector lamps L, vacuum tubes Vfi, VE and VB, transiormers T4, T! and TO, and relays Rl,

lays Ri, R2, RS and RS. Vacuum tube vo and e transformer Till may be oonsidered as common to both the primary and secondary control apparatus and relay RJ, tube -V'I 'and transformer TT are common to and under joint control of the primary and secondary apparatus. With the system thusly divided into primary and secondary 'signal control apparatus, it may be said that the primary apparatus is responsive to conditions asians:

'14 o! de-ctivation or detection ot either o! its detectors Pd or PI to inltiete operation of the ioul slgnal il dependent upon' signal operative condition of the secondary control pparatus and is 5 responsive to conditions oi' activation or non-detectionoi its detectors Pi and PI to render the secondary apparatus incapable oi' initiating operation o! the ioul signai. Also it may be said that the seconda-y apparatus is responsive to conditions oi activation or non-detection of its detectors Pl-, PI, P: and PI to renderthe primary apparatus incapable oi' initiating operation oi the foul signal il and is responsive to conditions oi' de-activation or detection of any one o! its detectors PI, Pz, P! or PI to-initiate operation 'of the !oui signal I'I dependent upon a siznal operative condition oi' the primary control apparatus.

" Expamtion and operation o; Fig. 16

From the i'oregoing explanation or the system as hooked up in accordance with Fig. 3, it will be evident 'that interception o! any one of the light beams !I to ZI. inclusive. of Fig. 3 during the reiatively long interval (six to twelve seconds preferably) that the relay R! is energized, as a result oi' a ball having in'tercepted either light beam 24 or II. will result in the calling of a foul. Experience has shown that this feature is desirable'in connection with beams :I and 23 to ZI inclusive but is objectional in connection with the beam 22 tor the reason that the interception ot beam 22 oi' Fig. 3 occasionally results in the calling oi a !oul as a result oi' an act occurring subsequent to the act resulting in thedischarge of a bowled ball and which act does not, under the rules, constitute a toul. For example the swinging of a foot, or the like, over but clear of the foul line and alley after the act resulting in the bowled ball has been iully completed. 'and even while the ball is still rollins 'on the alley and the relay RO is still energized, does not constitute a tou] even though it may result in interruption oi' the upper i'oul line beam 22. Obviously, therefore, with the system hooked up in accordance with Fig. 3. there remains the possibility oi' misinterpreting certain legitimate acts for iouls and producing an occasionai false ioul signal. I i

50 It is for the purpose ot overcoming the above noted objection to the system, when hooked up as in Fig 3, that I provide the improvement therein iliustrated in Fig. 10, wherein all parte and wires common to Fig. 3 are indicated as like 55 parts and wherein those elements of Fig. 3, not

necessary for the purpose of explaining the opetation of the additional feature of Fig. 10, have been omitted.` For the purpose oi' automatically rendering the photo-cell P! inoperative to inso itiate a i'oul, independently of reiay RS, I interpose in the lead ll'l, contacis !21 and I o! a relay RI I. The coil :I oi' this relay RII is normally de-energized but is adapted to be energized irom a fast heating type rectifler tube VI I, whose two plates 35' are tied together and connected to a common lead s. The fllament II' of the tube VII is connected in a permanently closed circuit with the secondar-y oi' transiormer Tll whose primary winding is connected in a normally open circuit comprising a lead !29, a lead !30, lead 14, contacts s and fl 'oi relay R9. lead 15 and part oi lead Bl. V The system incorporating the improvement ot F'g. 10 will respond to a bowled ball just as does 's the system ot Fig. 3 which is to say that the interceptlon of one or both of the beams 24 and 25 will cause momentary de-energization of relays 4 and 5 aand consequent energization of relay RS resulting in an upward movement of the contacts 58 and Bl of relay RS and the sustaining thereof in that position for a'period of six to twelve seconds. Also in the system of Fig. as in the system shown in Fig. 3, the interruption of any one of the light beams 2l to 26 incluslve immediately after energization of the coi of relay RS will result in a foul signal, since the contacts !21 and !28 of relay RI I, and which are interposed in lead Il'l, are normally closed. However, the termination of the period during which the interruption of the light beam 22 will result in a foul signal following the energization of coil 38 of relay RS is determined entirely independently of the relay RS in the scheme of Fig. 10 and is brought about a's follows, to wit, (a) as a result of the energization of coil 38 of relay RS, the

. lead and part of lead 61; and (c) responsive to this energization of coil 38' of relay RI I, the switch contacts |21 and !28 of relay RII will be opened, thereby breaking the lead ll'l at this point and making it impossible to complete the circuit through the coil 38 of relay R'I responsive to subsequent closing of contacts El and 42 of relay R2, the 'system having now been rendered inoperative to produce a foul signal responsive to interruption of light beam 22 during the rema'nder of the time that relay RS is energized.

With the system thus modified by incorporation of the' improvement shown in Fig. 10, it is possible for a bowler to complete the act resulting in a bowled ball and then by an entirely separate and distinct act, subsequent to the three to five second interval required for the tube VI I to heat up and during the balance of the longer period that relay RII remains energized, to swing his feet, arms, legs or hands through the beam 22 without causing a foul signal, so long as he keeps his hands, legs, arms, or the like, above the beams 2l, 23, 2 3 or 25 and out of the wall beam 26. Of course, if during this time the bowler comes so close to the surface of the alley as to interrupt the beams 2! or 23, such an act will be treated as though he had touched the alley and a, foul will be called.

What I claim is:

1. In a foul detecting and indicating system for bowling alleys having a foul line, a normally inoperative foul indicating signal, a device for detecting the presence of an object above the foul line, a device for detecting the passage of a bowling ball in a zone spaced from the foul line a distance sumcient that the ball will be beyond the foul line before entering said zone, and means under joint control' of the detecting devices for controlling operation of the foul signal including a, time delay device preservlng the state of detection of the second device after the ball has passed through said zone and an element removing the first device from operation before the end oi' th operation of said time delay device.

2. In a foul detecting and'indicating system for bowling alleys. having a foul line, a foul indicatv foul line, a third device for detecting the passage of a bowling ball in a zone spaced from the foul line a distance suflicientthat the ball will be beyond the foul line before entering said zone. and means under joint control of the detecting devices for controlling operation of the foul signal including a time delay device preserving the state of detection of the third device after. the ball has passed through said zone and an element removing the device associated with the upper beam from operation before the end of the operation of said time delay device.

3. In a foul detecting and indicating system for bowling alleys, having a foul line, a foul indicating signal, vertically spaced detecting devices for detecting the presence of an object present above the foul line, detecting means spaced from said devices for determining that a bowling ball has been put into play, means for removing the upper of said devices from operation within a short time after said detecting means has been actuated by the ball placed in play. means controlled by said devices and said detecting means jointly for operating said signal.

4. In a foul detecting and indicating system for bowling alleys, having a foul line, a foul indicating signal, vertically spaced detecting devices for detecting the presence of an object present above the foul line, means for removing the upper of said devices from operation within a short time after the ball is placed in play.'means coacting with said devices for Operating said signal.

5. In a foul detecting and indicating system for a. bowling alley having a foul line, a foul indicating signal, means creating two detector zones that extend transversely of a, bowling alley beyond the foul line, one adjacent the foul line too wide to be covered by a bowling ball at any given time including a cascaded beam of light, said zones being spaced in such relation to one another that a bowling ball placed in play will pass out of the cascade zone before entering the other zone, independent detectors for detecting the presence of objects in said zones, said detectors being substantially instantly responsive to the presence of an object in their respective zones, and means under joint control of the two detecting devices for actuating .the signal after the ball has been detected in said second zone.

6. In a foul detecting and indicating system for bowling alleys, a foul signal, independentdevices for detecting the presence of objects in different zones extending transversely of a bowling alley in such spaced relation to each other that a bowling ball put in play will pass out of one zone before entering the other zone, the detecting device of said other zone including a relay energized by th presence of a ball in said other zone by a vacuum tube whose filament circuit is opened' when said relay is energized, and mean under joint control of the relay and the detecting means for the first zone for actuating said signal during the time the filament circuit is open.

7. In a foul detecting and indicating system for bowling alleys, a foul' signal, vertically spaced means for detecting infractions of the rules of play at the foul line, the upper of said means including a beam of light extending parallel and above the foul line and above the other detecting means, a device for determining when a bowling ball hee been pl ced in pl y. and mema for rendering said upper means lnoperatlve within o couple of seconds after said devlce hes been actuated by said ball. and means jointly controlled by said means and said devce tor actuatlng said signal.

8. In a foul detectlng andlndicatlng system !or a, bowung alley. means for detectlng infractiom of rules of play at the oul line, means cooperatlve therewth tor determlnlng when a bowllng ball o 1099334 has been placed in play, and means controlled by the last means for lndicatlng to the bowler that 'thealleylsreadytocalatmlanytlmeduring the time the.: said readlnes existu.

PUTNAMMSIH'I'H. I 16 I mos: CHE!) The following references are ol' record in the me of ths patent:

Umm suma mmm-s' Number Nome Dote &202.674 seaman May 28, 1940 &037.671 Yomnes Apr. 14, 1936 Touceds. Nov. 23, 1937 &214.274 Glendemn: -`8ept. 10, 1940 

